Developers, get ready - Samsung has begun unleashing a barrage of Galaxy S4 kernel source on its open source repository, starting with unlocked editions of the phone and a variant bound for Virgin Mobile Canada.

The distinction between the GT-I9500 and the 9505, in case you're not aware, is one of chipset. The 9500 is the Exynos Octa-powered edition of the Galaxy S4, which has not yet had any official release date attached to it.